聴覚障害乳幼児のプロソディーの発達的変化と補聴器装用効果の実証的研究

有证据表明，失聪婴儿在生命的早期阶段发出的声音与正常婴儿发出的声音是一样的，因此人们传统上认为听力在婴儿的声音发育中起着次要作用。在美国进行的一项对失聪婴儿和听力正常婴儿的声音发育进行的更广泛的比较表明，传统的观点是错误的。通过对两名听障婴儿和三名正常婴儿的类语化比较研究，探讨听觉经验在声音发育中的作用。健全的音节重复（被称为“规范的咿呀学语”）在出生后的前10个月就发生了，而聋哑婴儿却没有，这表明听力在声音发育中起着重要作用。如果从聋哑人和听力正常的婴儿发出的语音的发音和声学模式来观察婴儿的声音，那么聋哑人和听力正常的婴儿的咿呀学语之间的区别是显而易见的。如果从典型咿呀学语开始的年龄推断出放大的开始年龄，那么聋儿应该从此时发生的听觉感知和声音产生之间的相互作用中受益。

The traditional belief that audition plays a minor role in infant vocal development depends on evidence that deaf infants produce the same kinds of sounds as hearing infants in the early stage of life. A more extensive comparison of vocal development in deaf and hearing infants conducted in the US indicates that the traditional belief is in error. A comparative study of the speech-like vacalization of two hearing-impaired infants and three hearing infants was conducted in order to examine the role of auditory experience in the vocal development. Well-formed syllable repetition which is called "canonical babbling") was occurred by the first 10 months of life by hearing infants but not by deaf infants, indicating that audition plays an important role in vocal development. The difference between babbling in the deaf and hearing is apparent if infant vocal sounds are observed from articulatory and acoustic patterns of speech sounds produced by deaf and hearing infants. If the age of onset of amplification was deduced from the age of onset of canonical babbling then deaf infants should benefit from the interaction between auditory perception and vocal production which occur at this time.